CaltechAUTHORS
  A Caltech Library Service

Freestream velocity-profile measurement in a large-scale, high-enthalpy reflected-shock tunnel

Shekhtman, D. and Yu, W. M. and Mustafa, M. A. and Parziale, N. J. and Austin, J. M. (2021) Freestream velocity-profile measurement in a large-scale, high-enthalpy reflected-shock tunnel. Experiments in Fluids, 62 (5). Art. No. 118. ISSN 0723-4864. PMCID PMC8097679. doi:10.1007/s00348-021-03207-6. https://resolver.caltech.edu/CaltechAUTHORS:20210507-100745485

Full text is not posted in this repository. Consult Related URLs below.

Use this Persistent URL to link to this item: https://resolver.caltech.edu/CaltechAUTHORS:20210507-100745485

Abstract

We apply Krypton Tagging Velocimetry (KTV) to measure velocity profiles in the freestream of a large, national-scale high-enthalpy facility, the T5 Reflected-Shock Tunnel at Caltech. The KTV scheme utilizes two-photon excitation at 216.67 nm with a pulsed dye laser, followed by re-excitation at 769.45 nm with a continuous laser diode. Results from a nine-shot experimental campaign are presented where N₂ and air gas mixtures are doped with krypton, denoted as 99% N₂/1% Kr, and 75% N₂/20% O₂/5% Kr, respectively. Flow conditions were varied through much of the T5 parameter space (reservoir enthalpy h_R ≈ 5−16 MJ/kg). We compare our experimental freestream velocity-profile measurements to reacting, Navier–Stokes nozzle calculations with success, to within the uncertainty of the experiment. Then, we discuss some of the limitations of the present measurement technique, including quenching effects and flow luminosity; and, we present an uncertainty estimate in the freestream velocity computations that arise from the experimentally derived inputs to the code.


Item Type:Article
Related URLs:
URLURL TypeDescription
https://doi.org/10.1007/s00348-021-03207-6DOIArticle
https://rdcu.be/ckbWcPublisherFree ReadCube access
https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8097679PubMed CentralArticle
ORCID:
AuthorORCID
Shekhtman, D.0000-0003-0648-5435
Yu, W. M.0000-0002-1133-3199
Mustafa, M. A.0000-0002-4523-0737
Parziale, N. J.0000-0001-9880-1727
Austin, J. M.0000-0003-3129-5035
Additional Information:© The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2021. Received 30 December 2020; Revised 08 April 2021; Accepted 10 April 2021; Published 05 May 2021. We would like to acknowledge Prof. Hans Hornung of Caltech for providing valuable advice regarding all aspects of the project. Additionally, we would like to thank Bahram Valiferdowsi, also of Caltech, for operating the tunnel and assisting with the experimental setup. Mustafa and Parziale were supported by AFOSR Young Investigator Program Grant FA9550-16-1-0262 and AFOSR Grant FA9550-18-1-0403; equipment for this work was supported by AFOSR DURIP Grants FA9550-15-1-0325 and FA9550-19-1-0182. Support was provided by US Air Force Small Business Innovation Research grants FA9101-17-P-0094 and FA2487-19-C-0013. Shekhtman was supported by the Stevens Institute of Technology Provost Fellowship and the ONR Young Investigator Research Program Grant N00014-20-1-2549. Yu and Austin were partially supported by AFOSR Grant FA9550-19-1-0219. The authors declare that they have no conflict of interest.
Funders:
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-16-1-0262
Air Force Office of Scientific Research (AFOSR)FA9550-18-1-0403
Air Force Office of Scientific Research (AFOSR)FA9550-15-1-0325
Air Force Office of Scientific Research (AFOSR)FA9550-19-1-0182
Air Force Office of Scientific Research (AFOSR)FA9101-17-P-0094
Air Force Office of Scientific Research (AFOSR)FA2487-19-C-0013
Stevens Institute of TechnologyUNSPECIFIED
Office of Naval Research (ONR)N00014-20-1-2549
Air Force Office of Scientific Research (AFOSR)FA9550-19-1-0219
Issue or Number:5
PubMed Central ID:PMC8097679
DOI:10.1007/s00348-021-03207-6
Record Number:CaltechAUTHORS:20210507-100745485
Persistent URL:https://resolver.caltech.edu/CaltechAUTHORS:20210507-100745485
Official Citation:Shekhtman, D., Yu, W.M., Mustafa, M.A. et al. Freestream velocity-profile measurement in a large-scale, high-enthalpy reflected-shock tunnel. Exp Fluids 62, 118 (2021). https://doi.org/10.1007/s00348-021-03207-6
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:109005
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:07 May 2021 17:20
Last Modified:07 May 2021 17:20

Repository Staff Only: item control page